http://wopi.readthedocs.io/en/latest/build_test_ship/validator.html As per this documentation, we need to build some HTML host page.
In this document, they mention one point that I didn't understand completely
The simplest way to use the validation application is to use the view action. To use the view action hosts should treat .wopitest files the same way other Office documents are treated. In other words, hosts should do the following:
Launch a host page pointed at the .wopitest file. Ideally, this should be the same host page used to host regular Office Online sessions. This will allow the validation application to test things like PostMessage and do some validation on the way the Office Online iframe was loaded.
What is .wopitest file and what I need to do exactly, Can anyone please guide me ? please explain stepwise